Description: Genuine GM Electronic Brake Control Module Assembly, part number 84256781. This GM OEM electronic brake control module assembly is an electronic control module that operates and monitors its vehicle system using inputs from sensors and switches. Made by General Motors to original equipment standards for correct fit, finish and durability—no guesswork with aftermarket parts. Verify fitment using your VIN or GM part number 84256781 before ordering. Shipped from Gateway Buick GMC, an authorized GM dealer.